命令行中的render rmarkdown文件出现错误：未提供html\u依赖项的路径

我试图在linux中呈现一个Rmarkdown文件，最终我希望它生成一个动态的.html文件，供人们签出。我使用的命令是

R -e "rmarkdown::render('./test_rshiny2.Rmd',output_file='./results/Diagnos_Plot.html')".

然而，我不断地得到这个错误：

Error: path for html_dependency not provided.

以下是我的会话信息：

R version 3.6.3 (2020-02-29)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 16.04.3 LTS

Matrix products: default
BLAS:   /opt/htcf/spack/opt/spack/linux-ubuntu16.04-x86_64/gcc-5.4.0/r-3.6.3-wjv45rejzld4tqrpekyen7mtmm2ko6qo/rlib/R/lib/libRblas.so
LAPACK: /opt/htcf/spack/opt/spack/linux-ubuntu16.04-x86_64/gcc-5.4.0/r-3.6.3-wjv45rejzld4tqrpekyen7mtmm2ko6qo/rlib/R/lib/libRlapack.so

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] compiler_3.6.3

这里有人能帮忙吗？ 非常感谢